We investigated molecular states and cluster gas-like states in light nuclei based on theoretical calculations with antisymmetrized molecular dynamics. The calculated results of B-13 suggest that largely deformed states construct rotational bands, K-pi = 3/2(-) and K-pi = 1/2(+), starting from 5 MeV and 8 MeV, respectively. The neutron structure of the K-pi = 3/2(-) is analogous to the intruder ground state of Be-12. In the predicted K-pi = 1/2(+) band, we found largely deformed structure with a proton excited configuration. The band-head 1/(2)+ state is assigned to the 1/2(+)(4.83 MeV), which was experimentally suggested to be the proton intruder state. Structure of He-8 were also investigated. In the results, it was found that the ground state of He-8 has both the j-j coupling feature(p(3/2) closure) and the L-S coupling feature(He-4+2n+2n). The results also suggest possible existence of the 0(2)(+) state with dineutron gas-like structure of 4 He-4+2n+2n, which has an analogy to the 3 alpha-cluster structure of the C-12(0(2)(+)) state.
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